姬家河水库大坝安全鉴定分析

Safety Appraisal Analysis of Jijiahe Reservoir Dam

姬家河水库已建成运行50年,基于工程水文地质、建设、维护及运行现状,在采用汇水面积相关法、综合参数法、推理公式法和瞬时单位线法对水库调洪计算的基础上,应用北京理正渗流和边坡稳定分析软件,对大坝各运行工况的防洪、渗流与结构稳定等进行探讨。结果显示:大坝防洪能力、坝体结构稳定为C级,渗流稳定为A级,抗震安全为C级,为急需的工程除险加固提供了依据,可供类似工程参考。

Jijiahe Reservoir has been built and operated for 50 years.Based on the hydrogeological,construction,maintenance and operation status of the project,flood control calculations are carried out with the catchment area correlation method,the comprehensive parameter method,the inference formula method,and the instantaneous unit line method.Then,the Beijing Lizheng seepage and slope stability analysis software is used to analyze the flood control,seepage and structure stabilities of the dam under various working conditions.The results show that the flood control capacity and the structural stability of the dam are of Level C.The seepage stability is of Level A,and the seismic safety is of Level C.The results provide important basis for the urgent reinforcement of the project and also useful reference for similar projects.